Crank pin and shaft truing tool



J. H. SUTTER AND C. N. ATHERTON.

CRANK PIN AND SHAFT TRUING TOOL.

APPLICATION FILED APR.14, 1919- 1,344,831.

Patented June 29, 1920.

amtow CJZA i/zez'fazz V6.4 (l Rwanda UNITED STATES PATENT OFFICE.

JOSIAH I-I. SUTTER AND CHARLES N. 'AT'HERTON, or WICHITA, KANSAS.

CRANK PI N AND SHAFT TRUING TOOL.

Specification of Letters Patent. Patented J 11116 29, 1920.

Application filed April 14, 1919. Serial No. 289,956.

To all whom it may concern: I

Be it known that we, JosIAH H. SUTTER and CHARLES N. A'rrInR'roN, citizens of the United States, residing at lVichita, in the county of Sedgwick and State of Kansas, have invented certain new and useful Improvements in Crank Pin and Shaft Truing Tools; and we do declare the following to be a full, clear, and exact description of the invention such as will enable others skilled in the art to which it'appertains to make and use the same.

Our invention relates to improvements in hand lathes and more particularly to a device intended principally for truing crank shafts and crank pins.

One object of. the invention is to provide a device of the class specified having means for guiding the cutter carrying stock of the tool around. the work, comprising a bearing which is adjustable for contact with crank pins and the like of different diameters, and in this connection, a further object is to provide for additionally adjustingthe bearing according to the length of the area to be trued.

A further object of the invention is to provide a cutter which, like the bearing above mentioned, isadjusted according to the diameter of the shaft or the like upon which the work is being performed, and a still further object is to provide for lateral expansibility of the cutter according to the length of the crank pin or the like upon which it is to operate.

With the foregoing in view, the invention resides in the novel construction and association of parts hereinafter described and claimed, reference being made to the accompanying drawing which forms a part of this application.

Figure 1 is a longitudinal section partly in elevation, of a hand lathe constructed in accordance with our invention.

Figs. 2 and 3 are transverse sections on the planes indicated by the lines 22 and 33 of Fig. 1, showing respectively the bearing and the cutter above referred to.

Fig. 1 is a perspective view of one of the sections of which the bearing is prefer ably constructed.

Fig. 5' is a perspective of one section of the cutter.

, Briefly speaking, the device consists of a stock S, a cutter 0, means for accurately guiding the stock and cutter around the work, comprising a bearing B, and means whereby the cutter and bearing may be ad justed to the curvature of the work and to the length thereof.

The stock S is shown in the form of an elongated frame having a central yoke 1 formed of two sections hinged together at 2 and secured together at a point opposite the hinge, by means of a bolt or the like 3. Two preferably U-shaped guides 4 extend oppositely from the two halves of theyoke 1 and carry the bearing B and the cutter C respectively.

The bearing B is by preference formed of upper and lower relatively thick plates or sections 6 slidably received between guide flange 7 on the parallel sides of the guide 4:, and a plurality of comparatively thin plates or sections 8 interposed between said sections 6. All of the sections 6 and 8 are provided with openings 9 through which a clamping bolt 10 passes, said bolt also extending through the sides of the guide 4 and serving to. rigidly clamp the bearing B in place. The openings 9 are of suflicient size topermit the sections 6 and 8 to slide relatively in both longitudinal and trans verse directions, and it will be seen that said sections maybe adjusted so that the inner face of the bearing B snugly contacts with the work W, regardless of the diameter of the latter, and the sections in question may alsobe extended as illustrated in Fig. 2 so that they will contact with the work throughout the length of the area to be trued by the cutter C. v

The cutter C is constructed in substantially the same manner as the bearing B, that is of upper and lower plates or sections 6 guided by flanges 7 on the parallel sides of the guide 5, and a plurality of relatively thin sections 8' interposed between said sections 6'. Slots 9 are formed transversely of the sections 6 and 8' and the clamping boltlO' passes through said slots. The sections 8' form cutters for truing the work W and it will be seen that said sections may be relatively adjusted both laterally and longitudinally to'adapt them both to the length of the work and the curvature thereof. The ends of the bolt 10' pass through spacing collars 11 which are loosely received in openings 12 in the sides of the guide 5 and by this arrangement adjustment of the cutter as a whole is permitted to feed the same to the work, the depth of out being regulated by the sections 6.

Any preferred means could well be employed for adjusting the cutter (l but I prefer to use a screw 1.3 threaded in the outer end of the guide 5, the inner end of said screw bearing against a thrust block l i which is slidable in the guide and is provided with a curved inner surface to contact with the several sections of the cutter. It is essential that the curvature l5 shall'bc formed on a radius equal to the radius of the work, and it is thus insured that if the sections of the cutter are adjusted so that they contact with the surface 15, they will be properly disposed for operation upon the work. This requires however that a number of the thrust blocks 1% be provided, having curved surfaces on difl'erent radii for adjusting the cutter for work upon shafts, crank pins and the like of numerous diameters. The screw 13 by preference extends irom the stock S a suliicient distance to provide a handle for operating the tool and whenever requirechsaid screw may be turned to feed the cutter to the work, and during this operation, the block i l slides between the flanges 7'.

In most instances it is advisable, in addition to the adjustable bearing 13, to provide a pair of set screws 16 threaded through the yoke 1 and having-rounded inner ends for contact with the work, thus insuring proper centering of the latter and preventi ng any possible lateral vibration of the tool.

In operation, the cutter C is adjusted both in curvature and width, according to the size of the crank pin, shaft or the like to be trued, using a block i l of the proper curvature. After the cutter is properly set up, the several sections thereof are held clamped together by the bolt ill and the collars ll. The two sections of the yoke may now be swung apart upon the hinge 2 and passed around the work, being then tightly secured by the bolt 3. The bearing B is new adjusted to the curvature anti length of the work and heldin adjusted position by tightening of the bolt 10. The screws 16 may now be threaded inwardly until they properly contact with the shaft or the like and the entire device is then ready for operation. By turning the entire stock 3 around the work, the cutter C operates thereon to produce the required turning effect and as required, said cutter is advanced by the screw 13, the depth or out being at all times regulated by the plates (3.

From the foregoing, taken in connection with the accompanying drawing, it will be seen that although the invention is of comparatively s'iniple and inexpensive nature, it

will be highly ellicient and in every way dosiable, and since probably the best results are obtainable from the details disclosed, they may well be followed. lVe wish it understood however that within the scope of the invention as claimed, considerable latitude is allowed for making numerous minor changes.

e claim:

1. In a hand lathe, a stock having a cutter, and a unitary bearing carried by said stock for accurately guiding the stock and cutter around the work, said bearing comprising flat plates relatively adjustable on parallel lines to dispose their ends on different arcs, according to the diameter of the work.

2. In a hand lathe, a stock having a cutter, and means carried by said stock for accurately guiding the stock and cutter around the work, comprising a bearing formed of sections resting slidably against each other and adapted to be relatively adjusted to dispose their ends on different arcs for contact with work of numerous diameters.

3. In a hand lathe, a stock having a lat eral U shaped guide, a cutter carried by said stock, and means for accurately guiding said stock and cutter around the work, comprising a work engaging bearing in said U shaped guide formed of plates resting slid ably against each other and adapted to be relatively adjusted to locate their ends for contact with work of different diameters, said plates having slots, and a bolt passing through said slots and through the sides of said" guide for clamping said plates in adjusted position.

In a hand lathe, a stock having a cutter, and a unitary bearing carried by said stock -For accurately guiding the stock and cutter around the work, said bearing having a curved work engaging face expansible and retractable in a direction parallel with the work axis, according to the length of the work.

In a hand lathe, a stock having a'cutter, and a unitary bearing carried by said stock for accurately guiding the stock and cutter arnsuid the work, said bearing comprising fiat plates relatively adjustable on parallel lines in a direction parallel with the axis of the work, whereby to adjust said bearing according to the length of the work.

6. In a hand lathe, a stock having a cut-. ter, and means carried by said stock for accurately guiding said stock and cutter around the work, comprising a work engaging bearing formed of sections resting slidably against each other and relatively adjustable parallel with the axis of the work to vary the work engaging width of the bearing according to the length of the work.

7. In a hand lathe, a stock having a lateral U-shaped guide, a cutter carried by said stock, and means for accurately guiding said stock and cutter around the work, comprising a bearing in said guide formed of plates resting slidably against each other 1 accurately guiding said stock and cutter arounl l the work, comprising a work engaging bearing formed of sections relatively movable in two directions, first to adjust them to work of different diameters, and second to adjust them according to the length of the work.

S); In a hand lathe, a stock having a cutter, and means carried by said stock for accurately guiding said stock and cutter around the work, comprising a work en gagingbearing formed of sections resting slidably against each other and relatively movable in two directions, first to adjust them to work of different diameters, and second to adjust them according to the length of the work.

10. In a hand lathe, a stock having a lat eral U-shaped guide, a cutter carried by said stock, and means for guiding said stock and said cutter around the work, comprising a bearing in said guide formed of fiat plates resting slidably against each other and adjustable longitudinally for contact with work of different diameters, said plates being also adjustable laterally according to the length of the work, said plates having slots, and a bolt passing through said slots and through the sides of said guide for clamping said plates in adjusted position.

11. In a hand lathe, a stock having means for guiding it around the work, and a cutter carried by said stock and formed of fiat plates each having a cutting edge and rela" tively adjustable on parallel lines to vary the contour of said cutter according to the diameter of the work.

12. In a hand lathe, a stock having means for guiding it around the work, and a cutter carried by said stock and formed of sections resting slidably against each other and each having a cutting edge, said sections being relatively adjustable to dispose said cutting edges for operation on work of different diameters.

13. In a hand lathe, a stock having a lateral U-shaped guide, means for guiding said stock around the work, and a cutter in said guide consisting of flat plates resting slidably against each other and each having a cutting edge, said plates being relatively adjustable to locate said cutting edges for operation on work of different diameters,

said plates having slots, and a bolt passing through said slots for clamping said plates together.

14. In a hand lathe, a stock having means for guiding it around the work and a cutter carried by said stock and formed of relatively movable fiat plates each having a cutting edge and relatively adjustable to laterally expand the cutter according to the length of the work.

15. In a hand lathe, a stock having'means for guiding it around the work, and a cutter carried by said stockand formed of flat plates each having a cutting edge, said plates resting slidably against each other and being adapted for relative adjustment according to the length of the work.

16. In a hand lathe, a stock having a lateral U-shaped guide, means for guiding said stock around the work, and a cutter in said guide formed of flat plates, each having a cutting edge, said plates being relatively slidable to vary thewidth of the cutter and having slots, and a bolt passing through said slots for clamping said plates. in adjusted position.

17 In a hand lathe, a stock having means for guiding it around the work, and a cutter carried by said stock and formed of flat plates each having a cutting edge and relatively adjustable in two directions to vary both the width of the cutter and the contour of its cutting portion.

18. In a hand lathe, a stock havin means for guiding it around the work, an a cutter carried by said stock and formed of sections resting slidably against each other and each having a cutting edge, said sections being adjustable in one direction to adapt the cutting edges to the size of the work, and being adjustable in another direction to increase the width of the cutter according to the length of the shaft.

19. In a hand lathe, a stock having a lateral U-shaped guide, means for guiding said stock around the work, and a cutter in said guide consisting of fiat plates resting slidably against each other and each having a cutting edge, said plates being longitudinally adjustable to adapt the cutting edges to the diameter of work, and being transversely adjustable to vary the width of the cutter according to the length of the work, said plates having slots, and a bolt passing through said slots for clamping said plates together.

20. In a hand lathe, a stock having a lateral guide, means for guidin said stock around the work, a cutter sli able in said guide and formed of relatively slidable plates adjustable to adapt the cutter to the diameter of the work, the front ends of said plates having cutting edges, and thrust blocks havtime in said guide to abut the rear ends of said plates, whereby to set their front ends onthe proper arc.

21. In a hand lathe, a stock having a lateral guide, means for guiding said stock around the work, a cutter slidable in said guide and formed of relatively slidable plates adjustable to adapt the cutter to the diameter of the work, the front ends ofsaid plates having cutting edges, thrust blocks having surfaces curved on the same radii as the numerous sizes of work to be operated upon, said blocks being receivable one at a time in. said guide to abutthe rear ends of said plates, whereby to set their front ends on the proper are, and a screw threaded through the end of said guide and bearing against said thrust block for feeding the cutter to the work.

22 In a hand lathe, a stock, means carried by said stock for guiding it around the work, consisting of a work engaging bearing formed of sections adjustable relatively according-to the diameter of the Work, and

a cutter carried by said stock and formed of sections eaehhaving a cuttingedge, said sections being adjustable relatively to locate the cutting edges on different arcs, according to the diameter of the Work.

23. A structure as specified in claim 22, the sections of said bearing and said cutter being laterally adjustable also to wiry the width of the bearing and cutter according to the length of the work.

24. In a hand lathe, a stock having a lateral guide, means carried by said stock for guiding the same around the work, a cutter mountedin said guide and composed of sections resting slidably against each other and each having a cutting edge, and additional blunt ended sections between the other sections and the sides of said guide, with their ends disposed to contact with the work and limit the depth of out.

In testimony whereof we have hereunto set our hands.

JOSIAH H. SUTTER.

CHARLES N. ATHERTON. 

